Door-frame.



No. 817,199. I PATENTED APR. 10, 1906. S. P. STEVENSON.

DOOR FRAME.

APPLIOATIOR FILED SEPT. 20, 1901.

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Specification of Letters Pateiit.

Patented April 10, 1906.

Aoplication filed September 20, 1901- Berial No. 76,718.

To all 11/72/0112, it may concern:

Be it known that I, SAMUELPRIOE STE- VENSON, a citizen of the United States, residing in the city of Chester, in the county of Delaware and State of Pennsylvania, have invented a new and useful Improvement in Door-Frames Adapted for Erection and Use in Buildin s for Air-Tight and Refrigerating Storage, or which the following is a specification.

This invention relates .to the frames for door-openings'for air-tight apart ments which are made .as an article of manufacture and sale andfrom theirconstruction-are specially adapted for use in buildings containing cold- .storage chambers with concrete floors and 'at their lower ends by one or more bars, preferably angle-irons, adapted to be embedded in and covered by a concrete floor to permit the formation of a threshold of such concrete over which wheeled vehicles may pass without injury and upon which the lower end of the door may close with a substantially airtight joint, so that the jambs maybe properly secured to one anotherand firmly seated in the concrete of the floor and threshold.

The construction of my invention is shown in the accompanying drawin s, in which-- Figure 1 is a front view of the lower portion of a door-frame embodying this invention, with the door-sill and threshold shown in dotted lines. Fig. 2 is a side elevation thereof.

fastened to them by screwsg, and excavate the floor between and infront of the j ambs a a and stand the frame with the lower ends of the jambs a c and the angle-irons ff in the excavation resting upon the bottom. I then fill in a concrete 111 the excavation, covering the angle-irons, and with an upper surface 71. between the jambs a a nearly level with the bottom of the door to form the sill i, and in front thereof, inclined downwardly to the level of the floorb,forming an inclined threshold c, the packings e and e when the door is o ened clear the threshold 0 and as the door 0 oses bend and make close contact with the concrete surface between the jambs a a. The concrete and angle-irons hold the jambs a a rigidly in osition as set up.

These C oor-frames, made and braced as described, form an article of manufacture ready for sale, erection, and use, and are an improvement upon the inventions set forth in my Letters Patent No. 697,689, dated April 15, 1902, and my application, Serial No. 69,575, filed July 24, 1901. 7

Having described my invention, what I claim is- 1. A new and useful article of manufacture and sale consisting of a door-frame having j ambs connected at the lower ends by one or more bars adapted to be embedded in a concrete floor for the purpose of bracin said jainbs to each other and securing the l rame, inbuildings suitable for air-tight and refrigerating storage as set forth.

2. A new and useful article of manufacture and sale consisting of a doorframe having above said bars. g

S. PRICE STEVENSON. Witnesses C. R. MORGAN, GEO. Hmsr. 

